Mining-machine



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No. 291,012. Patented. Deo'. 25, v1883.

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WITNBS ATTORNEYS.

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(No Model.) 2 Sheets-Sheet 2,.

X.KBRM, Jr., au HAMMER.

` MINING MAQHIMB. No. 291,0'12. Patented Deo. 2'51883.

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XAvIEIi` KERN, JE., AND JOHN HAMMER, OE wEsT EEOOHEIELD, OHIO.

MINING-MACHINE.

y' SPECIFICATION formingV part of Letters Patent No. 291,012, datedDecember 25, ISES..

Application filed April2B,1S83. (No model.) A

To all whom it may concern.-

have invented ccrtainnew andl useful InI-V provements inMining-Machines; and we do hereby-declare that the following is a full,clear, and exactdescription of the invention, whichwill enable othersskilled in the art to which it appertains to makeand use lthe same,reference being had to the accompanying drawings, which form a partofthis specification, and in which- Figure'l is a perspective view of theclamp which forms a part of our invention, showing it in Open adjustmentfor the reception of the screw-threaded drillshank. Fig. 2 is asectional view of the clamp through its supporting lugs or trunnions,showing the clamp closed, Fig'. 3 is avdetail view'of the device forsupporting the clamp and drill-shank in operating the machine; and Fig.4 is a perspective view of the complete apparatus,show ing the samefixed in position ready for use.

Similar letters of reference indicate corre sponding parts in all thefigures.

Our invention relates to mining-machines adapted to the mining of coaland other ininerals; and it consists in certain improvements upon theminingmachine for which Letters Patent of the United States No. 260,031were granted to Xavier Kern, Jr., on the 27th day of June, 1882, whichsaid improvements will be hereinafter more fully described and claimed.I

In the accompanying drawings, A represents the body of the drill-clamp,which is provided with two laterally-extending arms or trunnions, B,which latter are adapted to rest in the adjustable forked standard H, byfitting into the notches h of the same. This body portion A is providedon its inner face with a semi-cylindrical screw-threaded piece,

'0, which, when combined with the semi-cylindrical screw-threaded pieceDin the hinged portion E of the clamp, forms a female-screwthreadedsocket, which iirmly holds, directs, and feeds the screw-threaded shankof the to fasten them removably in` their respective sections, A'and E,of the clamp, so that when the threads are worn out they may be readilyremoved-and others substituted without in! jury to the body portion ofthe clamp. The body portion A is also provided with two holes orsockets, c, into which are secured, screws or lugs b, for the purpose oftaking up the wear. Vhen the clamp is first secured to the drill-shank,these screws or lugs bV are adj usted either in or outso as to cause theremovable threaded clamp-sections C and D to register accurately withthe drill-shank, and as the screw-threads in said parts C and D wearaway the screws or lugs b may be filed off or driven farther into theirrespective sockets, to take up the wear. The hinged portion E of theclamp is provided with a slotted projection, F, adapted to engage thethreaded shank of'a screw, G, the lower end of which is hinged upon abolt, I-I, between the lugs or ears I, which are cast upon or in onepiece with one of the fixed trunnions B. By swinging the screw G intothe slotted projection F and tightening down the thumb-nut J, it will beseen that the two parts A and E may be clamped iirmly around thethreaded drillshank, which works in the clamp, while,by loosening thethuml'rnut and swinging the screw out of the slotted projection F theclamp may be thrown open and the drill-shank removed in a moment oftime. It will also be seen that by having the screw hinged and swingingtransversely upon the body of the clamp the nut may bear upon the sameplace upon the slotted projection when the clamp is opened wider orclosed, thus preventing all possibility `of the same slipping out of itsslots, which is apt to happen with the screw projecting rigidly upward,when the clamp is opened wide.

In operating the apparatus, the trunnions B of the clamp are made torest in the notches h of a forked standard, H,wl1ich has a threadedshank, K, screwed into a threaded aperture, 7c, at the outer end of anarm, L, the other end of which is notched to form sharp teeth or projections H. Ajaw-piece, N, is fastened to arm L by means of a screw-bolt,O, which is inauger orv drill, as thelatter is turned by hand or 2 byany other suitable motive power. Ve prefer to make the parts C and D ofbrass,- and serted through slots or apertures o and Zin Ioo the parts Nand L, respectively, and is provided at its lower end with the nut I?.In

using` the apparatus, the teeth M and jaw N are inserted into the boreor serewhole last made, as shown in Fig. 4 on Sheet 2 of thc drawings,and adjusted by means of the nut P on bolt O, so as to be wedged rmlyinto the screw-hole, and fix arm L rmly in the same, after which thebifurcated bearing Hin the outer end of the arm may be adjusted byscrewing it up or down, so as to bring the clamp, which rests in itsnotches 71, into the proper position for working the drill-shank, thelateral arms or trunnions B of the clamp permitting the contained drillor auger to be turned 0r pointed to any inclination or angle at which itis desired to bore in avertical plane, and the screw-threaded shank,turning in the threaded aperture, allows the drill to' be turned in anydirection in a horizontal plane.

rlhe drill-shank (shown at Q) is made square at its rear end, to adaptit to be fitted into the slotted crank-arm R, in the slot S of which Byloosening this nut, the slotted orankarm may be moved up or down uponthe end of the drill-shank, so as to adjust the leverage with which itis desired to work the drill, according to the resistance of thematerial bored into.

Having thus described our invent-ion, we claim and desire to secure byLetters Patent of the United States- The combination of the arm adaptedto be clamped into the former drill-hole, with the bifurcated standard,having notches in the edges of its bifurcated fiat upper ends andscrew-threaded lower end, fitting and turning in a screw-threadedperforation in the outer end of the clamping-arm, as and for the purposeshown and set forth.

In testimony that we claim the foregoing as our own we have hereuntoaffixed our signatures in the presence of two witnesses.

XAVIER KERN, JR. JOHN HAMMER. Xlfitiiesses:

ISAAC ULMAN, WILL R. ULMAN.

